<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>登录页面</title>
    <link rel="stylesheet" href="css/conmmon.css">
    <link rel="stylesheet" href="css/login.css">
    <script src="js/jquery.min.js"></script>
</head>

<body>
    <!-- 导航栏 -->
    <div class="nav">
        <!-- img/logo2.jpg -->
        <img src="img/logo2.jpg" alt="">
        <span class="title">我的博客系统</span>
        <!-- 用来占据中间位置 -->
        <span class="spacer"></span>
        <a href="blog_list.html">主页</a>
        <a href="reg.html">注册</a>
    </div>
    <!-- 版心 -->
    <div class="login-container">
        <!-- 中间的登陆框 -->
        <div class="login-dialog">
            <h3>登陆</h3>
            <div class="row">
                <span>用户名</span>
                <input type="text" id="username">
            </div>
            <div class="row">
                <span>密码</span>
                <input type="password" id="password">
            </div>
            <img id="imgVerify" alt="点击刷新" class="verification_img" onclick="getVerImg()">
            <div class="row">
                <span>验证码</span>
                <input type="text" name="code" id="verification_code">
            </div>
            <div class="row">
                <button id="submit" onclick="doLogin()">提交</button>
            </div>
        </div>
    </div>
    <script>
        // 执行登录操作
        function doLogin(){
            // 1. 校验参数
            var username = jQuery("#username");
            var password = jQuery("#password");
            var code = jQuery("#verification_code");
            if (username.val().trim() == ""){
                alert("请先输入用户名");
                username.focus();
                return;
            }
            if (password.val().trim() == ""){
                alert("请先输入密码");
                password.focus();
                return;
            }
            if (code.val() == "") {
                alert("请输入验证码！");
                code.focus();
                return;
            }
            
            jQuery.ajax({
                url: "/checkcode/verify",
                type: "POST",
                data: { "vercode": code.val() },
                success: function (result) {
                    if (result == null || result.code != 200) {
                        alert("验证码错误或失效，请重试！");
                        getVerImg();
                        code.focus();
                    } else {
                        // 2. 将数据提交给后端
                        jQuery.ajax({
                            url:"/user/login",
                            type:"GET",
                            data:{
                                "username":username.val(),
                                "password":password.val()
                            },
                            success:function(res){
                                // 3. 将结果展示给用户
                                if (res.code == 200 && res.data == 1){
                                    // 登录成功
                                    alert("登陆成功")
                                    // 跳转到 我的文章管理页
                                    location.href = "myblog_list.html";
                                }else{
                                    alert("登陆失败" + res.msg);
                                }
                            }
                            
                        });
                    }
                }
            });
            
        }

        function getVerImg() {

            //加随机时间或者随机数是为了区分相同链接的不同请求
            //强制刷新：除了禁止缓存外，还需要给服务端传递一个唯一的参数（随机数或者时间）
            jQuery("#imgVerify").attr("src", "/checkcode/getverimg?t=" + (new Date().getTime()));
        }
        getVerImg();
    </script>
</body>

</html>